Cylinder construction.



S. H. LEWIS.

CYLINDER CONSTRUCTION.

APPLIOATION 91mm DEC. 14, 1.012

Patented Sept. 23, 1913.

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5H. Lewis.

Whine we S. H. LEWIS.

CYLINDER CONSTRUCTION.

APPLICATION nun) B11014, 1312.

Patented Sept. 23, 1913 I EHLELuiE. O

flu q S. H. LEWIS.

CYLINDER CONSTRUCTION.

APPLICATION FILED mm. 14, 1912,

mmmm Patented Sept. 23, 1913.

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1 0 u o O o 0 o o 0 i, 0 0 o o o o o 0 y I a W 0 Q I 1 Y 0 ii Q o 3 i} J o {1 0 j 0 "J 0 1 0 0 o m O o 0 0 0 o o 0 O o o O 0 o O O o 0 SAMUEL HANCE LEWIS, OF PRINCETON, W'YJES'L VIRGINIA.

CYLINDER CONSTRUCTION.

Specification of LfittclSiEittZllil.

Appiibation filed December lei, 1912. Serial No. 713x331.

hausted and live steam is Cir the slab or frame of the engine. Suitable packing (not shown) 12. It is seen that my construction is simple and cheap to manufacture. It is thus seen that the portions of the exhaust ports which are adjacent the slab or frame 16 are arranged above or to one side of the slab or frame 16, whereby the exhaust ports have no intersection withthe slab or frame 16. The advantage in doing this is to avoid having these exhaust ports cut or passed through the slab or frame. It has been found when the exhaust ports do out or pass through 16 that it is exceedingly difiicult if not impossible to obtain a steamtight connection between the ports at that point. By arranging the exhaust ports 19 above the slab or frame 16, the length of the exhaust ports is decreased and the shortest possible direct exhaust passages are pro vided for the steam passing chest, which greatly increases the efficiency may be interposed between the upper portions of the fiat plates 9 and 14: adjacent the exhaust openings.

Mounted to reciprocate within the steamcliest 12 is a valve 22, comprising a reduced central portion or spindle carrying at its ends enlarged heads23. This valve is of the ordinary cbnstruction and is shifted by a rod 2f, connected with the valve gear (not shown) as is customary. It is obvious that the valve 22 is adapted to cover and uncover the exhaust ports 19.

Connected with the boiler 7 is a live steam supply pipe 525. connected with a live steam supply pipe 26, through the medium of a suitable coupling 27. The pipe 26 is preferably cast integral with the steam chest 19 and leads into the upper side of the same midway between the ends thereof, as more clearly shown in Fig. -'l.

The numeral 28 designates to establish communication steam chest 12 and cylinder 1;}, These ports alternately serve as inlet and exhaust ports. The ports 28 leading to the ends of the cylinder 13 upon opposite sides of a piston 29. have connection with a piss ton rod 30. The piston rod 30 is connected with the driving wheels, in the ordinary manner. When the valve 22 is in the forward position. as sl nvn in Fig. t, steam in the right end of the c linder 13 is being exbeing fed into the left end of the cylinder to move the piston 29 to the right. When the piston 29 has reached the end of its travel to the right, the valve '22 is shifted to the right, whereby ports, serving between the from the steamas shown.

the steam in the left end of the cylinder is exhausted and live steam is fed into the right end of the cylinder to move the'piston to the left.

By my construction, it is possible to di' rectly connect the exhaust ports 19 and 20 (the adjacent portions of the same being above the slab or frame 16 and not passing therethrough) so that a perfect steam-tight joint is-obtained. These exhaust ports form the shortest possible direct passage for the exhaust of the steam to the atmosphere, below or adjacent the smoke stack.

common exhaust port 21 offers the least possible resistance to the exhaust. In this manner the back pressure upon the piston in the cylinder is reduced, with a corresponding increase of power or efficiency of the engine. Attention is called to the fact that the exhaust ports in the casting 11 are directly connected with the exhaust ports inthe saddle without interference with the slab or extension frame 16 and without the use. of a connecting pipe or gland which has been found to be economical. By my construction it is possible to quickly and easily remove the steam-chest and cylinder from the saddle, the same being connected therewith by a single join v It is to be understood that the form of my invention; herewith shown and described, is to be takenas a preferred example of the same, and that certain changes in the shape, size and arrangement of parts may be resorted to without departing joined claim.

Having fully claim The combination with a frame extension, of a separate saddle disposed upon the inner side of the frame extension, a steamchest-cylinder casting disposed upon the outer side of the frame extension and having exhaust ports leading into the opposite ends of the steam chest and crossing the frame extension at a point spaced from the same, so that it does not intersect therewith, means described my invention, I

The curved from the spirit of the invention or the scope of the subconnecting the saddle and steam-chest-cylinder casting with the frame extension, and means to supply live steam to the steam chest.

In testimony whereof, I afiix my signature in presence of two witnesses.

SAMUEL HANGE LEWIS.

Witnesses:

J. W. HAMLIN, WV. L. PUoxET'r. 

